??????1??????????????mysql-connector-java??latest????
??????????5.1.6??????????????????
????5.1.48????????
<dependency&gt;
&nbsp; &nbsp; <groupId&gt;mysql</groupId&gt;
&nbsp; &nbsp; <artifactId&gt;mysql-connector-java</artifactId&gt;
&nbsp; &nbsp; <version&gt;5.1.48</version&gt;
</dependency&gt;





------------------&nbsp;????????&nbsp;------------------
??????:&nbsp;"LakeShen"<shenleifight...@gmail.com&gt;;
????????:&nbsp;2019??12??26??(??????) ????11:35
??????:&nbsp;"user-zh"<user-zh@flink.apache.org&gt;;

????:&nbsp;Re: Flink????Kafka??Mysql?? End-To-End Exactly-Once????????????



?????????????????????????? ??????????????

Best wishes??
????

?????? <glusec...@gmail.com&gt; ??2019??12??25?????? ????4:09??????

&gt; ????????????
&gt;
&gt; ??????????Kafka??Mysql?? End-To-End Exactly-Once??????????2????????
&gt; 1??com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException:
&gt; Communications link failure during commit(). Transaction resolution 
unknown.
&gt; 2??org.apache.flink.streaming.runtime.tasks.TimerException:
&gt; 
org.apache.flink.streaming.runtime.tasks.ExceptionInChainedOperatorException:
&gt; Could not forward element to next operator
&gt;
&gt; ??????????????????????????????demo????????
&gt; git clone https://github.com/lusecond/flink_help --depth=1
&gt;
&gt;
&gt; 
????????????????????TwoPhaseCommitSinkFunction????4??????????beginTransaction??preCommit??commit??abort
&gt; 
????????????????????????????????????????????jdbc????????????????????????????????????????????????????????

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